Miniature & Instrument Bearings

MINIATURE BEARINGS
Inch Series Part Number Interchange

This chart is intended as a reference only. The users should consult with the listed manufacturers' catalogs to establish dimensional interchangeability. Ball complements and load ratings may differ although dimensionally equivalent. NPB cannot be held responsible for any errors contained herein.

INCH SERIES | RADIAL OPEN MINIATURE BEARINGS INTERCHANGE CHART
NPB
BASIC PART
NUMBER		 STANDARD
REFERENCE
NUMBER		 NHBB NMB MPB Myonic BARDEN OLD NHBB GRW EZO/SPB NSK PKB
SSRI2 SR09 SSRI2 DDRI2 S2C UL1304X SR09 SR09 SS1016 SR09 SR09 SR09
SSRI21/2 SR0 SSRI21/2 DDRI21/2 S21/2C UL1505X SR0 SR0 SS1191 SR0 SR0 SR0
SSRI3 SR1 SSRI3 DDRI3 S3C R1706X SR1 SR1 SS1397 SR1 SR1 SR1
SSRI4 SR14 SSRI4 DDRI4 S4C R2508X SR14 SR14 SS5/64 SR1-4 SR1-4 SR1-4
SSRI3332 SR133 SSRI3332 DDRI3332 S3332C UL3006X SR133 SR133 SS2380 SR133 SR133 SR133
SSRI5 SR15 SSRI5 DDRI5 S5C R3010X SR15 SR15 SS3/32 SR1-5 SR1-5 SR1-5
SSRI418 SR144 SSRI418 DDRI418 S418C UL4008X SR144 SR144 SS3175 SR144 SR144 SR144
SSRI518 SR25 SSRI518 DDRI518 S518C R4010X SR25 SR25 SS1/8A SR2-5 SR2-5 SR2-5
SSRI618 SR26 SSRI618 DDRI618 S618C - SR26 SR26 SS1/8A/6 SR2-6 SR2-6 SR2-6
SSR2 SR2 SSR2 DDR2 SR2C R4012X SR2 SR2 SS1/8B SR2 SR2 SR2
SSR2A SR2A SSR2A DDR2A SR2AC - SR2A SR2A SS1/8B/083 SR2A SR2A SR2A
SSRI5532 SR155 SSRI5532 DDRI5532 S5532C UL5010X SR155 SR155 SS3967 SR155 SR155 SR155
SSRI5632 SR156 SSRI5632 DDRI5632 S5632C UL6010X SR156 SR156 SS4763A SR156 SR156 SR156
SSRI6632 SR166 SSRI6632 DDRI6632 S6316C UL6012X SR166 SR166 SS4763B SR166 SR166 SR166
SSR3 SR3 SSR3 DDR3 SR3R R6016X SR3 SR3 SS3/16 SR3 SR3 SR3
SSRI614 SR168 SSRI614 DDRI614 S614C UL8012X SR168 SR168 SS6350A SR168 SR168 SR168
SSRI814 SR188 SSRI814 DDRI814 S814C UL8016X SR188 SR188 SS6350B SR188 SR188 SR188
SSR4 SR4 SSR4 DDR4 SR4C R8020X SR4 SR4 SS1/4A SR4 SR4 SR4
SSRI1214 SR4A SSRI1214 DDRI1214 SR4AR - SR4A SR4A SS1/4 SR4A SR4A SR4A
SSRI8516 SR1810 SSRI8516 DDRI8516 S8516R UL10016X SR1810 SR1810 SS7938 SR1810 SR1810 SR1810
SSRI1038 SR620 - - - - - - - - - -
SSRI1438 SR6 SSRI1438 DDRI1438 SR6R R12028X SR6 SR6 SS3/8 SR6 SR6 SR6
SSRI1212 SR824 SSRI1212 DDRI1212 S812 - SR1216 SR824 - - - -
SSRI1412 SR6-5 SSRI1412 DDRI1412 - - - SR6-5 - SR6-5 - -
SSRI1458 SR1028 SSRI1458 DDRI1458 S1014 - SR1420 SR1028 - - - -
SSRI1634 SR1232 SSRI1634 DDRI1634 S1216 - SR1624 SR1232 - - - -
SSRI1812 SR8 SSRI1812 DDRI1812 SR8R - SR8 SR8 SS1/2 SR8 SR8 -
INCH SERIES | RADIAL FLANGED OPEN MINIATURE BEARINGS INTERCHANGE CHART
NPB
BASIC PART
NUMBER		 STANDARD
REFERENCE
NUMBER		 NHBB NMB MPB Myonic BARDEN OLD NHBB GRW EZO/SPB NSK PKB
SSRIF2 SFR09 SSRIF2 DDRIF2 S2FC ULK1304X SFR09 SFR09 - - - -
SSRIF21/2 SFR0 SSRIF21/2 DDRIF21/2 S21/2FC ULK1505X SFR0 SFR0 SSF1191 SFR0 SFR0 SFR0
SSRIF3 SFR1 SSRIF3 DDRIF3 S3FC RK1706X SFR1 SFR1 SSF1397 SFR1 SFR1 SFR1
SSRIF4 SFR14 SSRIF4 DDRIF4 S4FC RK2508X SFR14 SFR14 SSF5/64 SFR1-4 SFR1-4 SFR1-4
SSRIF3332 SFR133 SSRIF3332 DDRIF3332 S3332FC ULK3006X SFR133 SFR133 SSF2380 SFR133 SFR133 SFR133
SSRIF5 SFR15 SSRIF5 DDRIF5 S5FC RK3010X SFR15 SFR15 SSF3/32 SFR1-5 SFR1-5 SFR1-5
SSRIF418 SFR144 SSRIF418 DDRIF418 S418FC ULK4008X SFR144 SFR144 SSF3175 SFR144 SFR144 SFR144
SSRIF518 SFR25 SSRIF518 DDRIF518 S518FC RK4010X SFR25 SFR25 SSF1/8A SFR2-5 SFR2-5 SFR2-5
SSRIF618 SFR26 SSRIF618 DDRIF618 S618FC - SFR26 SFR26 SSF1/8A/6 SFR2-6 SFR2-6 SFR2-6
SSRF2 SFR2 SSRF2 DDRF2 SR2FC RK4012X SFR2 SFR2 SSF1/8B SFR2 SFR2 SFR2
SSRIF5532 SFR155 SSRIF5532 DDRIF5532 S5532FC ULK5010X SFR155 SFR155 SSF3967 SFR155 SFR155 SFR155
SSRIF5632 SFR156 SSRIF5632 DDRIF5632 S5632FC ULK6010X SFR156 SFR156 SSF4763A SFR156 SFR156 SFR156
SSRIF6632 SFR166 SSRIF6632 DDRIF6632 S6316FC ULK6012X SFR166 SFR166 SSF4763B SFR166 SFR166 SFR166
SSRF3 SFR3 SSRF3 DDRF3 SR3FC RK6016X SFR3X3 SFR3 SSF3/16 SFR3 SFR3 SFR3
SSRIF614 SFR168 SSRIF614 DDRIF614 S614FC ULK8012X SFR168 SFR168 SSF6350A SFR168 SFR168 SFR168
SSRIF814 SFR188 SSRIF814 DDRIF814 S814FC ULK8016X SFR188 SFR188 SSF6350B SFR188 SFR188 SFR188
SSRF4 SFR4 SSRF4 DDRF4 SR4FC RK8020X SFR4 SFR4 SSF1/4A SFR4 SFR4 SFR4
SSRIF8516 SFR1810 SSRIF8516 DDRIF8516 S8516FC ULK10016X SFR1810 SFR1810 SSF7938 SFR1810 SFR1810 SFR1810
SSRIF1438 SFR6 SSRIF1438 DDRIF1438 SR6FR RK12028X SFR6X5 SFR6D SSF3/8 SFR6 SFR6 SFR6
SSRIF1812 - - - - - - - - SFR8 SFR8 SFR8
INCH SERIES | RADIAL SHIELDED MINIATURE BEARINGS INTERCHANGE CHART
NPB
BASIC PART
NUMBER		 STANDARD
REFERENCE
NUMBER		 NHBB NMB MPB Myonic BARDEN OLD NHBB GRW EZO/SPB NSK PKB
SSRI21/2ZZ SR0ZZ SSRI21/2ZZ DDRI21/2ZZ S21/2CHH ULZ1505X SR0SS SR0PP SS11912Z SR0ZZ SR0ZZ SR0ZZ
SSRI3ZZ SR1ZZ SSRI3ZZ DDRI3ZZ S3CHH RF1706X SR1SS SR1PP SS13972Z SR1ZZ SR1ZZ SR1ZZ
SSRI4ZZ SR14ZZ SSRI4ZZ DDRI4ZZ S4CHH RF2508X SR14SS SR14PP SS5/642Z SR1-4ZZ SR1-4ZZ SR1-4ZZ
SSRI3332ZZ SR133ZZ SSRI3332ZZ DDRI3332ZZ S3332CHH ULZ3006X SR133SS SR133PP SS23802Z SR133ZZ SR133ZZ SR133ZZ
SSRI5ZZ SR15ZZ SSRI5ZZ DDRI5ZZ S5CHH RF3010X SR15SS SR15PP SS3/322Z SR1-5ZZ SR1-5ZZ SR1-5ZZ
SSRI418ZZ SR144ZZ SSRI418ZZ DDRI418ZZ S418CHH ULZ4008X SR144SS SR144PP SS31752Z SR144ZZ SR144ZZ SR144ZZ
SSRI518ZZ SR25ZZ SSRI518ZZ DDRI518ZZ S518CHH RF4010X SR25SS SR25PP SS1/8A2Z SR2-5ZZ SR2-5ZZ SR2-5ZZ
SSRI618ZZ SR26ZZ SSRI618ZZ DDRI618ZZ S618CHH - SR26SS SR26PP SS1/8A/62Z SR168ZZ SR168ZZ SR168ZZ
SSR2ZZ SR2ZZ SSR2ZZ DDR2ZZ SR2CHH RF4012X SR2SS SR2PP SS1/8B2Z SR2ZZ SR2ZZ SR2ZZ
SSR2AZZ SR2AZZ SSR2ZZA DDR2ZZA SR2ACHH - SR2ASS SR2APP SS1/S/8B/0832Z SR2AZZ SR2AZZ SR2AZZ
SSRI5532ZZ SR155ZZ SSRI5532ZZ DDRI5532ZZ S5532CHH ULZ5010Z SR155SS SR155PP SS39672Z SR155ZZ SR155ZZ SR155ZZ
SSRI5632ZZ SR156ZZ SSRI5632ZZ DDRI5632ZZ S5632CHH ULZ6010X SR156SS SR156PP SS4763A2Z SR156ZZ SR156ZZ SR156ZZ
SSRI6632ZZ SR166ZZ SSRI6632ZZ DDRI6632ZZ S6316CHH ULZ6012X SR166SS SR166PP SS4763B2Z SR166ZZ SR166ZZ SR166ZZ
SSR3ZZ SR3ZZ SSR3ZZ DDR3ZZ SR3RHH RF6016X SR3SS SR3PP SS3/162Z SR3ZZ SR3ZZ SR3ZZ
SSRI614ZZ SR168ZZ SSRI614ZZ DDRI614ZZ S614CHH ULZ8012X SR168SS SR168PP SS6350A2Z SR168ZZ SR168ZZ SR168ZZ
SSRI814ZZ SR188ZZ SSRI814ZZ DDRI814ZZ S814CHH ULZ8016X SR188SS SR188PP SS6350B2Z SR188ZZ SR188ZZ SR188ZZ
SSR4ZZ SR4ZZ SSR4ZZ DDR4ZZ SR4CHH RF8020X SR4SS SR4PP SS1/4A2Z SR4ZZ SR4ZZ SR4ZZ
SSRI1214ZZ SR4AZZ SSRI1214ZZ DDRI1214ZZ SR4ARHH - SR4ASS SR4APPD SS1/42Z SR4AZZ SR4AZZ SR4AZZ
SSRI8516ZZ SR1810ZZ SSRI8516ZZ DDRI8516ZZ S8516RHH ULZ10016X SR1810SS SR1810PP SS79382Z SR1810ZZ SR1810ZZ SR1810ZZ
SSRI1438ZZ SR6ZZ SSRI1438ZZ DDRI1438ZZ SR6RHH RZ12028X SR6SS SR6PPD SS3/82Z SR6ZZ SR6ZZ SR6ZZ
SSRI1212ZZ SR824ZZ SSRI1212ZZ DDRI1212ZZ S812CHH - SR1216SS SR824PP - - - -
SSRI1412ZZ SR6-5ZZ SSRI1412ZZ DDRI1412ZZ - - - SR6-5ZZ - SR6-5ZZ - -
SSRI1458ZZ SR1028ZZ SSRI1458ZZ DDRI1458ZZ S1014CHH - SR1420SS SR1028PP - - - -
SSRI1634ZZ SR1232ZZ SSRI1634ZZ DDRI1634ZZ S1216CHH - SR1624SS SR1232PP - - - -
SSRI1812ZZ SR8ZZ SSRI1812ZZ DDRI1812ZZ SR8RHH - SR8SS SR8PPD SS1/22Z SR8ZZ SR8ZZ SR8ZZ
INCH SERIES | RADIAL FLANGED SHIELDED MINIATURE BEARINGS INTERCHANGE CHART
NPB
BASIC PART
NUMBER		 STANDARD
REFERENCE
NUMBER		 NHBB NMB MPB Myonic BARDEN OLD NHBB GRW EZO/SPB NSK PKB
SSRIF21/2ZZ SFR0ZZ SSRIF21/2ZZ DDRIF21/2ZZ S21/2FCHH ULKZ1505X SFR0SS SFR0PP SSF11912Z SFR0ZZ SFR0ZZ SFR0ZZ
SSRIF3ZZ SFR1ZZ SSRIF3ZZ DDRIF3ZZ S3FCHH RKF1706X SFR1SS SFR1PP SSF13972Z SFR1ZZ SFR1ZZ SFR1ZZ
SSRIF4ZZ SFR14ZZ SSRIF4ZZ DDRIF4ZZ S4FCHH RKF2508X SFR14SS SFR14PP SSF5/642Z SFR1-4ZZ SFR1-4ZZ SFR1-4ZZ
SSRIF3332ZZ SFR133ZZ SSRIF3332ZZ DDRIF3332ZZ S3332FCHH ULKZ3006X SFR133SS SFR133PP SSF23802Z SFR133ZZ SFR133ZZ SFR133ZZ
SSRIF5ZZ SFR15ZZ SSRIF5ZZ DDRIF5ZZ S5FCHH RKF3010X SFR15SS SFR15PP SSF3/322Z SFR1-5ZZ SFR1-5ZZ SFR1-5ZZ
SSRIF418ZZ SFR144ZZ SSRIF418ZZ DDRIF418ZZ S418FCHH ULKZ4008X SFR144SS SFR144PP SSF31752Z SFR144ZZ SFR144ZZ SFR144ZZ
SSRIF518ZZ SFR25ZZ SSRIF518ZZ DDRIF518ZZ S518FCHH RKF4010X SFR25SS SFR25PP SSF1/8A2Z SFR2-5ZZ SFR2-5ZZ SFR2-5ZZ
SSRIF618ZZ SFR26ZZ SSRIF618ZZ DDRIF618ZZ S618FCHH - SFR26SS SFR26PP SSF1/8A/62Z SFR2-6ZZ SFR2-6ZZ SFR2-6ZZ
SSRF2ZZ SFR2ZZ SSRF2ZZ DDRF2ZZ SR2FCHH RKF4012X SFR2SS SFR2PP SSF1/8B2Z SFR2ZZ SFR2ZZ SFR2ZZ
SSRIF5532ZZ SFR155ZZ SSRIF5532ZZ DDRIF5532ZZ S5532FCHH ULKZ5010X SFR155SS SFR155PP SSF39672Z SFR155ZZ SFR155ZZ SFR155ZZ
SSRIF5632ZZ SFR156ZZ SSRIF5632ZZ DDRIF5632ZZ S5632FCHH ULKZ6010X SFR156SS SFR156PP SSF4763A2Z SFR156ZZ SFR156ZZ SFR156ZZ
SSRIF6632ZZ SFR166ZZ SSRIF6632ZZ DDRIF6632ZZ S6316FCHH ULKZ6012X SFR166SS SFR166PP SSF4763B2Z SFR166ZZ SFR166ZZ SFR166ZZ
SSRF3ZZ SFR3ZZ SSRF3ZZ DDRF3ZZ SR3FCHH RKF6016X SFR3SS SFR3PP SSF3/162Z SFR3ZZ SFR3ZZ SFR3ZZ
SSRIF614ZZ SFR168ZZ SSRIF614ZZ DDRIF614ZZ S614FCHH ULKZ8012X SFR168SS SFR168PP SSF6350A2Z SFR168ZZ SFR168ZZ SFR168ZZ
SSRIF814ZZ SFR188ZZ SSRIF814ZZ DDRIF814ZZ S814FCHH ULKZ8016X SFR188SS SFR188PP SSF6350B2Z SFR188ZZ SFR188ZZ SFR188ZZ
SSRF4ZZ SFR4ZZ SSRF4ZZ DDRF4ZZ SR4FCHH RKF8020X SFR4SS SFR4PP SSF1/4A2Z SFR4ZZ SFR4ZZ SFR4ZZ
SSRIF8516ZZ SFR1810ZZ SSRIF8516ZZ DDRIF8516ZZ S8516FCHH ULKZ10016X SFR1810SS SFR1810PP SSF79382Z SFR1810ZZ SFR1810ZZ SFR1810ZZ
SSRIF1438ZZ SFR6ZZ SSRIF1438ZZ DDRIF1438ZZ SR6FRHH RKZ12028X SFR6SS SFR6PPD SSF3/82Z SFR6ZZ SFR6ZZ SFR6ZZ
SSRIF1812ZZ - - - - - - - - SFR8ZZ SFR8ZZ SFR8ZZ